ccna 6th edition pdf

ccna 6th edition pdf

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(2) Master CIH virus removal methods. (6) Allow DNS access. Allow Internet users to access the internal DNS server. The purpose of this mechanism is to prevent illegal attackers from monitoring information on the transmission channel and illegally performing traffic and flow analysis. The countermeasures can use the security device to continuously send out pseudo-random sequences when there is no information transmission to confuse the useful information that illegal persons want to obtain. 3) Ensure data security (2) On the server side, the administrator generates a certificate for the user. Method 4: Search for values. (9) When the virus attack fails, it may cause the RPC service of the unpatched Windows system to crash, and the Windows XP system may automatically restart the computer. The worm does not successfully attack Windows Server 2003 , but can cause Windows Server 2003 system RPC service crashes, default is the system reboot repeatedly. Cisco PIX 515 firewall with integrated software and hardware platform,ccna 6th edition pdf, is a specialized firewall products, the use of operating as the system is not open UNIX or Windows NT operating system, instead of using a proprietary, real-time IOS , in safety performance And data stream processing performance is higher than router firewall or software firewall. Describe the destination ( internal or external ) network IP address. Use 0.0.0.0 to specify the default route ( all target networks ) . You can abbreviate the IP address 0.0.0.0 as 0 Because the data packets from the upper layer to the micro port layer are placed in a pre-allocated buffer. With the corresponding function provided by NDIS , you can get the first address and data length of the buffer. Therefore, you can add in the driver (3) The reason for the rule change. The Proxy Service Firewall directly faces a specific application layer service through a service program running on the host, so it is also called an application firewall. Its core is the proxy service process running on the firewall host. This process performs TCP/IP functions on behalf of users , and is actually a gateway connecting two networks for specific network applications. Apply a corresponding proxy service to each different application (E-mail , FTP , Telnet , WWW, etc. ) . If you want to establish a connection between the external network and the internal network, you must first pass the intermediate conversion of the proxy server. The internal network only accepts the request made by the proxy server and rejects the direct request from the external network. Agent service user can implement feasibility studies, detailed day -chi, audit trails and data encryption features and filter specific protocols and applications, such as blocked Java or Java Script and so on.

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Latest Cisco CCNA 200-301 Dumps

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